Anyone help with some advice?

I live in the UK but spend about 4 months per year in Thailand.

I am about to re-write my will and want to include boy special, just a small percentage, not the house and everything included!

I do not intend to make a will in Thailand as all my financial interests are in the UK.

Any ideas? Just include him like anyone else? Would the lawyers get hold of him by phone or facebook?!

He has a family in Esaan but like most he comes from a small village and sending a letter there would be difficult.